Table 1.
Study Participant Demographic and Smoking Characteristics: Overall and by Usual Brand Cigarette Rod Length
| Overall (N = 341) |
Usual Length Short (ULS) (4.7%, N = 16) |
Usual Length Medium/ King (ULM) (40.2%, N = 137) |
Usual Length Long (ULL) (55.1%, N = 188) |
p-value | |
|---|---|---|---|---|---|
| Male, % (N) | 45.8 (156) | 56.3 (9) | 47.5 (65) | 43.6(82) | .19a |
| Mean age (SD, range), years | 44.0 (12.1, 19–65) | 38.6 (11.3, 19–56) | 41.2 (12.0,20–65) | 46.5 (11.7, 19–65) | < .001a |
| Race, % (N) | |||||
| White | 68.0 (232) | 81.3 (13) | 81.0 (111) | 57.5 (108) | < .001a |
| Black | 24.3 (83) | 12.5 (2) | 12.4 (17) | 34.0 (64) | < .001a |
| Other | 7.6 (26) | 6.3 (1) | 6.6 (9) | 8.5 (16) | .80a |
| Education, % (N) | |||||
| ≤ High school | 43.4 (148) | 56.3 (9) | 38.0 (52) | 46.3 (87) | .03a |
| > High school | 56.6 (193) | 43.8 (7) | 62.0 (85) | 53.7 (101) | .03a |
| Income level, % (N) | |||||
| $0-$19,999 | 38.1 (102) | 38.5 (5) | 26.1 (29) | 47.2 (68) | .008a |
| $20,000-$39,999 | 35.5 (95) | 38.5 (5) | 38.7 (43) | 32.6 (47) | .60a |
| $40,000+ | 26.5 (71) | 23.1 (3) | 35.1 (39) | 20.1 (29) | .04a |
| Menthol, % (N) | 58.7 (200) | 50.0 (8) | 40.2 (55) | 72.9 (137) | < .001a |
| Cigarette type, % (N) | |||||
| Pack/carton | 84.8 (289) | 93.8 (15) | 71.5 (98) | 93.6 (176) | < .001a |
| Roll-your-own | 15.3 (52) | 6.3 (1) | 28.5 (39) | 6.4 (12) | < .001a |
| Mean cost per pack (SD, range), USD | 6.14 (2.55, 0.24–11.00) | 6.69 (2.21, 1.50–10.40) | 5.38 (2.90, 0.24–11.00) | 6.65 (2.15, 0.48–11.00) | < .001a |
| Mean PSCDI at V2 (SD, range) | 13.4 (3.4, 3.0–20.0) | 13.7 (3.1, 9.0–19.0) | 13.2 (3.4, 5.0–20.0) | 13.5 (3.4, 3.0–20.0) | .69a |
| Mean CPD at V2 (SD, range) | 19.5 (9.9, 1.3–60.0) | 22.5 (11.8, 7.3–45.6) | 21.0 (11.1, 1.3–60.0) | 18.1 (8.6, 2.2–56.6) | .88b |
| Mean eCO at V2 (SD, range), ppm | 28.8 (15.2, 4.0–100.0) | 30.7 (11.9, 10.0–58.0) | 29.6 (15.8, 4.0–100.0) | 28.0 (15.0, 4.0–85.0) | .65b |
| Mean plasma cotinine at V2 (SD, range), ng/ml | 291.0 (148.7, 18.1–918.0) | 324.2 (221.6, 131.4–918.0) | 290.0 (145.4, 23.7–812.4) | 289.2 (145.3, 18.1–708.0) | .33b |
| Mean cotinine per cigarette at V2 (SD, range), ng/ml | 16.78 (10.12, 2.28–84.05) [N=258] | 18.24 (9.35, 8.76–34.25) [N=11] | 15.72 (11.27, 2.28–84.05) [N=108] | 17.48 (9.19, 3.25–49.83) [N=139] | .37b |
| Withdrawn or lost to follow-up by V3, % (N) | 5.0 (17) | 0.0 (0) | 2.9 (4) | 6.9 (13) | .17b |
Note.
a
: Obtained appropriately from ANOVAs, chi-squares, and proportion test.
b
: Obtained from Linear Mixed models and Wald tests.
A p < .05 indicates statistically significant differences among the 3 groups.